find files and run lint and tests based on only files that changed

gistfile1.txt

#!/usr/bin/node
/* eslint-disable @typescript-eslint/no-unused-expressions */
// eslint-disable-next-line import/no-extraneous-dependencies
const sh = require('shell-tag');

const detectChangedFiles = () => {
	const appFolders = ['routes', 'pages', 'modules', 'hooks'];
  const changedFiles = sh`git diff develop --name-only`;

	return changedFiles.split(/\n/g).filter((file) => {
		return !file.startsWith('.') && appFolders.some(folder => file.includes(appFolders));
	}).join('\n').replace(/\n/g, ' ').replace(/client\//g, ' ');
};

const findRelatedTests = () => {
  const changedFiles = detectChangedFiles();
  const tests = sh`yarn jest --listTests --findRelatedTests ${changedFiles}`;
  return tests.replace(/\n/g, ' ');
};

const flag = process.argv.slice(2)[0];

function runBasedOnFlag() {
	const files = detectChangedFiles();
	if (files === '') {
		return 
	}

  const tests = findRelatedTests();

  switch (flag) {
    case '--lint': {
      sh`yarn eslint ${files}`;
      break;
    }

    case '--test': {
      sh`yarn test ${tests}`;
      break;
    }

    default: {
      sh`echo "no option"`;
    }
  }
}

runBasedOnFlag();